So, I was looking up upgrade my set up (my last board is a Lamar Cardiel and about 17 years old)...

Anyway, I was given a set of Preston bindings- they seem fine and all, but I wasn't given the center insert. What will fit in there? Does it have to be a "same-brand" thing? Can I even get just the insert?

or should I scrap 'em and get a new set of bindings.

I quit paying attention to what was happening with snowboarding for a while, and now I'm a lil' lost.